4. Nina had the following positive numbers: 7x, 12x, 5x, 8x, x and 4x where x is a positive integer. The median of these numbers was 72. a) Show that the value of x is 12 (be careful, simple). b) Using the value of x found in 'a', calculate the mean of these numbers.

Q: The numbers of students in 8 private schools in Amman are ordered as : 230 , 410 , 540 , X , 620 ,…

A: We have to find mean of data.

Q: A set of observations has 4 values and a mean of 33.6. A new observation of 21.3 is added to the…

A:

Q: The numbers of students in 8 private schools in Amman are ordered as: 230,410,540,…

A:

Q: The numbers of students in 8 private schools in Amman are ordered as : 230,410,540 , X ,…

A:

Q: 1. Out of 100 numbers, 20 were 5's, 40 were 4's, 35 were 6's and 5 were 2's. Find the mean

A:

Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

A: Introduction: Suppose there are k groups, such that the jth group [j = 1, 2, …, k] has nj…

Q: There (Choose one) venough evidence to conclude that the mean FICO score is more than the cutoff of…

A:

Q: Let X denote the number of siblings of a randomly selected student. Explain the difference between…

A: The random variable X represents the number of siblings of a randomly selected…

Q: 3. A researcher is conducting a survey about the cellphones used by 50 employee represents the…

A: If there are maximum 50 employees that are to be surveyed, then the possibilities of number of the…

Q: Suppose that 50 measurements were taken and the mean was calculated to be 4.55.  Assume next that…

A: Solution: From the given information, mean of 50 measurements is 4.55.

Q: To calculate the mean, ______ all the numbers in the data set and then _______ the total by the…

A: If the given data is  x1, x2, x3,................., xn Are the n terms

Q: In a manufacturing unit for electronic chips, Unit manufactures chips that are either defective…

A:

Q: Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have…

A: The given situation follows binomial distribution. The proportion of people born in United States…

Q: What is the margin of error for a 99% CI for a mean, when the sample size is 12, the sample average…

A: Given: Sample size, n = 12 Sample mean, x = 52 Sample standard deviation, s = 13 It follows a…

Q: 12 - Prove that the sum of the deviations of the values from their arithmetic scale for classified…

A: Arithmetic scale or arithmetic mean,  means that sum of the all the Values divided by total number…

Q: The recidivism rate for convicted sex offenders is 14%. A warden suspects that this percent is…

A:

Q: Suppose there are 5 students in a room. The mean age is 20.0 years, and the median age is 19. If the…

A: From the provided information, There are 5 students in a room. The mean age is 20.0 Years. The…

Q: The numbers of students in 8 private schools in Amman are ordered as : 230,410,540 , X ,…

A: We have to find mean..

Q: 5) If n1 =n2=n3=10, ӯ1=500, ӯ2=500 and ӯ3=500 then combined mean is equal to_________

A:

Q: 4. The mean score on SAT Math Reasoning is 518. A test preparation company claims that the mean…

A:

Q: From ggplot library in r, I am using the txhousing data set. How can I create a tibble that the…

A: Given information: A Tibble needs to be constructed using txhousing data set in R.

Q: The bank manager wants to show that the new system reduces typical customer waiting times to less…

A: a SHAPE :- BELL SHAPE     Reason :-sample size is largeb σx= σn= 2.2299=0.2231

Q: 18) In a small company there are 8 accountants, 14 engineers and 6 clerks. If the mean salary of…

A: Give that, n1=No of accountants=8 n2=No of engineers=14 n3=No of clerks=6 xbar1=Mean salary of…

Q: The scores of a random sample of 8 students on a physics test are as follows: 60, 62, 67, 69, 70,…

A: a. Since the population standard deviation is unknown and the sample size is small, the appropriate…

Q: The numbers of students in 8 private schools in Amman are ordered as: 230,410,540,…

A: We have to find correct answer for given question...

Q: a. If a constant c is added to each xi in a sample, yielding yi = xi + c, how do the sample mean and…

A: Mean: For a set of n observations, x1, x2, ... , xn mean is defined as, Median: For a frequency…

Q: Suppose that in key punching of 80 column IBM cards, the arithmetic mean number of mistakes per card…

A:

Q: A construction company has twenty workers. The company classified the workers into two groups:…

A: Let x denote the number of skilled workers and y denote the number of semi-skilled workers. Using…

Q: Suppose that 20% of the residents in a certain state support an increase in the property tax. An…

A: Given info: Suppose 20% of the residents in a certain state support an increase in the property tax.…

Q: The mean number of a set of 5 numbers is 12.7 . What extra number must be added to bring the mean up…

A: We know that,  Mean = (summation Xi)/n If Mean of 5 numbers = 12.7 then 12.7= (X1+X2+X3+X4+X5)/5…

Q: Lisa has entered a 95% condensate interval number (132,144 What is the estimate of the mean

A: Given 95% confidence interval for mean is (132, 144). The estimate of the mean is, Mean=132+1442…

Q: The matchsticks in 10 packages of matches randomly selected from the matches produced by a match…

A:

Q: A researcher wishes to demonstrate that the mean income of American families with 4 members is now…

A: We always put the no difference under null hypothesis

Q: Astudy was conduccled to determine the proportion of people who dream in black and white instead of…

A: Given , People over age 55 : Sample size = n1 = 317 Number of people who dream in black and white  =…

Q: In a small company there are 8 accountants , 14 engineers and 6 clerks . If the mean salary of the…

A: Solution: From the given information, there are 8 accountants, 14 engineers and 6 clerks in a…

Q: 6. The mean marks of 100 students were found to be 40. Later on it was discovered that a score of 53…

A:

Q: 2. Suppose that one word is selected at random from the sentence THE GIRL PUT ON HER BEAUTIFUL RED…

A: Here, X denotes the number of letters in the word that is selected. In this context, X takes on the…

Q: a city with three high schools, all the ninth gra k a Standardized Test, with these results: Mean…

A: We have given that,  X :- 83, 94, 70 f :- 263, 323, 184 Then,  We will find mean?

Q: The scores of a random sample of 8 students on a physics test are as follows: 60, 62, 67, 69, 70,…

A:

Q: 500 eggs are taken at random from a large consignment, and 50 are found to be bad. Estimate the…

A: Given: n=500 Let x = bad eggs =50 Hence, the percentage of bad eggs in the consignment is given by,…

Q: A consumer agency wants to determine which of two laundry detergents, A or B, cleans clothes better.…

A: Given information: The given randomization dot-plot is based on 200 simulated samples.

Q: a) Suppose the mean (average) of the 10 numbers is 35, median is 31. If you change only the 9th…

A: Gdfhhs

Q: 4. Suppose that only 10 students in Nabatieh campus had taken the midterm. Which of the following…

A: We know that, here  n= 10 (even) So median=(n/2 +(n/2+1)th term)/2 = (5th +6th term)/2

Q: Show that it is possible to find the 3-median of n numbers using O(n) comparisons.

A: It is possible to find the 3-median of n numbers using O(n) comparisons

Q: One sample has a mean of M=5 and a second sample has a mean of M=10. The two samples are combined…

A: Given that, sample 1 has mean = 5 and sample 2 has mean =10.

Q: A football player scored the following number of goals in the 10 matches: 1, 3, 2, 5, 8, 6, 1, 4, 7,…

A: Given Data: Number of goals in 10 matches are: 1, 3, 2, 5, 8, 6, 1, 4, 7, 9 The given value of the…

Q: The mean for the following values 10 ,60 ,50 , 30 , 40 , 20 is 34 Select one: True • False

A:

Q: The mean of 15 items was found to be 30. On rechecking, it was found that, two items were wrongly…

A:

Q: Central Airlines claims that the median price of a round-trip ticket from Chicago, Illinois, to…

A: Given, This claim is being challenged by the Association of Travel Agents, who believe the median…

Q: One sample has a mean of M=8 and a second samplehas a mean of M=16. The 2 samples are combined into…

A: Given data M1 = 8 M2 = 16 n1 = 3 n2 = 5